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key fob

Discussion in 'Gen 3 Prius Main Forum' started by Kimberly Gibson, Oct 24, 2020.

  1. Kimberly Gibson

    Kimberly Gibson New Member

    Joined:
    Oct 24, 2020
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    Location:
    illinois
    Vehicle:
    2011 Prius
    Model:
    N/A
    battery was changed in key fob. Will not unlock with buttons or with automatic door sensor; must use key. Once in the car we must place the key fob on power button to start, being in the car for a few minutes the dash reports that the key is not detected. Please help.
     
    #1 Kimberly Gibson, Oct 24, 2020
  2. Pluggo

    Pluggo Senior Member

    Joined:
    May 23, 2016
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    Location:
    Folsom, Pennsylvania
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    First, make sure the battery is installed right-side-up. The red LED should light when you press buttons.
     
    #2 Pluggo, Oct 25, 2020
  3. bettergolf

    bettergolf Active Member

    Joined:
    Jan 8, 2019
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    Location:
    Sanford NC
    Vehicle:
    2015 Prius
    Model:
    Two
    My 2015 started doing that key not detected when the 12v battery was going bad. Have the 12v battery checked.
     
    #3 bettergolf, Oct 25, 2020
  4. sam spade 2

    sam spade 2 Senior Member

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    Mar 31, 2018
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    Location:
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    Vehicle:
    2017 Prius c
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    Four
    +1
    Is it not true that the "engine starting" function does not depend on the battery in the FOB ?
    And that is a different function from what the buttons do ??
     
    #4 sam spade 2, Oct 25, 2020
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